CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 244 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) black (d) green
2. 2.🌈 Which colour of light is strongest in rgb(193, 73, 22)? (a) green (b) blue (c) red
3. 3.🌈 In #5e0000 the red part is the hex number 5e. What is it as a normal number?
4. 4.🌈 Which colour is #000000? (a) black (b) bright green (c) white (d) cyan
5. 5.🌈 In #009500 the green part is the hex number 95. What is it as a normal number?
6. 6.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) cyan (c) white (d) blue
7. 7.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 100 (d) 255
8. 8.🌈 Which colour is #0000ff? (a) cyan (b) blue (c) white (d) black
9. 9.🌈 Which hex code is magenta? (a) #00ff00 (b) #000000 (c) #0000ff (d) #ff00ff
10. 10.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) bright green (c) red (d) cyan
11. 11.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) cyan (c) black (d) white
12. 12.🌈 Which colour of light is strongest in rgb(84, 108, 158)? (a) red (b) blue (c) green
13. 13.🌈 Which colour is #ffffff? (a) cyan (b) yellow (c) white (d) magenta
14. 14.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) Z (d) F
15. 15.🌈 Which hex code is red? (a) #0000ff (b) #ffffff (c) #ff00ff (d) #ff0000
16. 16.🌈 Which hex code is blue? (a) #0000ff (b) #ffffff (c) #ff00ff (d) #00ff00
17. 17.🌈 In #0000fb the blue part is the hex number fb. What is it as a normal number?
18. 18.🌈 In #610000 the red part is the hex number 61. What is it as a normal number?
19. 19.🌈 Which colour is #ffff00? (a) blue (b) yellow (c) bright green (d) red
20. 20.🌈 Which hex code is white? (a) #ffff00 (b) #ff00ff (c) #ff0000 (d) #ffffff
21. 21.🌈 In #004a00 the green part is the hex number 4a. What is it as a normal number?
22. 22.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
23. 23.🌈 Which colour is #00ffff? (a) bright green (b) cyan (c) blue (d) magenta
24. 24.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) red (c) magenta (d) yellow
25. 25.🌈 Which colour of light is strongest in rgb(198, 116, 33)? (a) blue (b) green (c) red
26. 26.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) yellow (c) blue (d) black
27. 27.🌈 Which colour of light is strongest in rgb(95, 241, 10)? (a) red (b) green (c) blue
28. 28.🌈 Which colour of light is strongest in rgb(96, 205, 116)? (a) green (b) red (c) blue
29. 29.🌈 Which hex code is black? (a) #000000 (b) #00ffff (c) #ff00ff (d) #ff0000
30. 30.🌈 In #00de00 the green part is the hex number de. What is it as a normal number?
31. 31.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) cyan (c) white (d) blue
32. 32.🌈 Which hex code is yellow? (a) #ffff00 (b) #ff00ff (c) #000000 (d) #ff0000
33. 33.🌈 Which hex code is cyan? (a) #00ffff (b) #ffff00 (c) #ffffff (d) #00ff00
34. 34.🌈 Which colour is #ff00ff? (a) magenta (b) bright green (c) white (d) yellow
35. 35.🌈 In #e40000 the red part is the hex number e4. What is it as a normal number?
36. 36.🌈 Which colour is #00ff00? (a) red (b) yellow (c) blue (d) bright green
37. 37.🌈 In #00a900 the green part is the hex number a9. What is it as a normal number?
38. 38.🌈 In #0000f3 the blue part is the hex number f3. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(79, 245, 8)? (a) blue (b) green (c) red
40. 40.🌈 Which colour is rgb(0, 255, 255)? (a) bright green (b) cyan (c) white (d) red

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